If the guest trigger following sequences, the attach_backing will be leaked:
vg_resource_create_2d
vg_resource_attach_backing
vg_resource_unref
This patch fix this by freeing 'res->iov' in vg_resource_destroy.
Fixes: CVE-2021-3544
Reported-by: Li Qiang <liq3ea@163.com>
virtio-gpu fix:
5e8e3c4c75 ("virtio-gpu: fix resource leak
in virgl_cmd_resource_unref")
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <
20210516030403.107723-5-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
}
vugbm_buffer_destroy(&res->buffer);
+ g_free(res->iov);
pixman_image_unref(res->image);
QTAILQ_REMOVE(&g->reslist, res, next);
g_free(res);